• Real computational tasks are complicated.

• To accomplish them effectively you need to think before you code.

• Decompose a coding problem:
  1. Understand the problem.
     • Identify inputs and outputs.
  2. Break the problem down into a few pieces.
     • Build an outline on paper or as comments.
  3. Break those pieces into codeable chunks.
  4. Code one chunk at a time.
• Decompose a code chunk:
  1. Think about it.
  2. Write it.
  3. Test it ( on it’s own ).
  4. Fix any problems.

Demo decomposition-example.R.

Assign remaining exercises.